Well 240 bhp from a 1.6 means 150bhp/litre. From a NA engine, dont you think its a bit more than you can actually do? Unless you are running a race setup with bumped up comp and race fuel, its almost impossible. And for street tune with regular fuel, its impossible.
Renault is in process to release a Clio engine with 120bhp per liter with regular fuel.
We have done car engines around 150bhp per liter.
I am not claiming that this is a walk in the park nor am I claiming it is cheap. However, we can do it.